Motionless deer found by new worker (8)
I believe the answer is:
stagnant
'motionless' is the definition.
(I've seen this before)
'deer found by new worker' is the wordplay.
'deer' becomes 'stag' (stag is a kind of deer).
'found by' is a charade indicator (letters next to each other).
'new' becomes 'n' (abbreviation as in New Testament NT).
'worker' becomes 'ant' (worker is a type of ant).
'stag'+'n'+'ant'='STAGNANT'
(Other definitions for stagnant that I've seen before include "Showing little activity" , "unmoved" , "Stale - motionless" , "Standing still" , "(Of water) motionless" .)